57,6 → 57,8 |
#include <syscall/copy.h> |
#include <console/console.h> |
#include <print.h> |
#include <synch/rcu.h> |
#include <adt/listrcu.h> |
|
/** Execute code associated with IRQ notification. |
* |
171,21 → 173,27 |
{ |
ipl_t ipl; |
irq_t *irq; |
ipc_notif_cfg_t *new_notify, *old_notify; |
|
ipl = interrupts_disable(); |
irq = irq_find_and_lock(inr, devno); |
if (irq) { |
if (irq->notif_cfg.answerbox == box) { |
code_free(irq->notif_cfg.code); |
irq->notif_cfg.notify = false; |
irq->notif_cfg.answerbox = NULL; |
irq->notif_cfg.code = NULL; |
irq->notif_cfg.method = 0; |
irq->notif_cfg.counter = 0; |
if (rcu_dereference_pointer(irq->notif_cfg).answerbox == box) { |
new_notify = malloc(sizeof(ipc_notif_cfg_t),0); |
|
new_notify->notify = false; |
new_notify->answerbox = NULL; |
new_notify->code = NULL; |
new_notify->method = 0; |
new_notify->counter = 0; |
old_notify = irq->notif_cfg; |
copy_link_rcu(&irq->notif_cfg->link, &new_notify->link); |
rcu_assign_pointer(old_notify, new_notify); |
|
spinlock_lock(&box->irq_lock); |
list_remove(&irq->notif_cfg.link); |
list_remove_rcu(&rcu_dereference_pointer(irq->notif_cfg).link); |
spinlock_unlock(&box->irq_lock); |
rcu_sync_callback_normal_alloc(&ipc_notif_free_callback, irq->notif_cfg); |
|
spinlock_unlock(&irq->lock); |
} |
193,6 → 201,13 |
interrupts_restore(ipl); |
} |
|
void ipc_notif_free_callback(void* notif) |
{ |
code_free(((ipc_notif_cfg_t *)notif)->code); |
free(notif); |
|
} |
|
/** Register an answerbox as a receiving end for IRQ notifications. |
* |
* @param box Receiving answerbox. |
208,6 → 223,7 |
ipl_t ipl; |
irq_code_t *code; |
irq_t *irq; |
ipc_notif_cfg_t *new_notify, *old_notify; |
|
if (ucode) { |
code = code_from_uspace(ucode); |
224,21 → 240,25 |
return ENOENT; |
} |
|
if (irq->notif_cfg.answerbox) { |
if (rcu_dereference_pointer(irq->notif_cfg).answerbox) { |
spinlock_unlock(&irq->lock); |
interrupts_restore(ipl); |
code_free(code); |
return EEXISTS; |
} |
|
irq->notif_cfg.notify = true; |
irq->notif_cfg.answerbox = box; |
irq->notif_cfg.method = method; |
irq->notif_cfg.code = code; |
irq->notif_cfg.counter = 0; |
new_notify = malloc(sizeof(ipc_notif_cfg_t),0); |
new_notify->notify = true; |
new_notify->answerbox = box; |
new_notify->method = method; |
new_notify->code = code; |
new_notify->counter = 0; |
copy_link_rcu(&irq->notif_cfg->link, &new_notify->link); |
old_notify = irq->notif_cfg; |
rcu_assign_pointer(irq->notif_cfg, new_notify); |
rcu_sync_callback_normal_alloc(&ipc_notif_free_callback, old_notify); |
|
spinlock_lock(&box->irq_lock); |
list_append(&irq->notif_cfg.link, &box->irq_head); |
list_append_rcu(&new_notify->link, &box->irq_head); |
spinlock_unlock(&box->irq_lock); |
|
spinlock_unlock(&irq->lock); |
254,11 → 274,11 |
*/ |
static void send_call(irq_t *irq, call_t *call) |
{ |
spinlock_lock(&irq->notif_cfg.answerbox->irq_lock); |
list_append(&call->link, &irq->notif_cfg.answerbox->irq_notifs); |
spinlock_unlock(&irq->notif_cfg.answerbox->irq_lock); |
spinlock_lock(&rcu_dereference_pointer(irq->notif_cfg).answerbox->irq_lock); |
list_append_rcu(&call->link, &rcu_dereference_pointer(irq->notif_cfg).answerbox->irq_notifs); |
spinlock_unlock(&rcu_dereference_pointer(irq->notif_cfg).answerbox->irq_lock); |
|
waitq_wakeup(&irq->notif_cfg.answerbox->wq, WAKEUP_FIRST); |
waitq_wakeup(&rcu_dereference_pointer(irq->notif_cfg).answerbox->wq, WAKEUP_FIRST); |
} |
|
/** Send notification message |
270,7 → 290,7 |
|
spinlock_lock(&irq->lock); |
|
if (irq->notif_cfg.answerbox) { |
if (rcu_dereference_pointer(irq->notif_cfg).answerbox) { |
call = ipc_call_alloc(FRAME_ATOMIC); |
if (!call) { |
spinlock_unlock(&irq->lock); |
277,12 → 297,12 |
return; |
} |
call->flags |= IPC_CALL_NOTIF; |
IPC_SET_METHOD(call->data, irq->notif_cfg.method); |
IPC_SET_METHOD(call->data, rcu_dereference_pointer(irq->notif_cfg).method); |
IPC_SET_ARG1(call->data, a1); |
IPC_SET_ARG2(call->data, a2); |
IPC_SET_ARG3(call->data, a3); |
/* Put a counter to the message */ |
call->priv = ++irq->notif_cfg.counter; |
call->priv = ++rcu_dereference_pointer(irq->notif_cfg).counter; |
|
send_call(irq, call); |
} |
299,7 → 319,7 |
|
ASSERT(irq); |
|
if (irq->notif_cfg.answerbox) { |
if (rcu_dereference_pointer(irq->notif_cfg).answerbox) { |
call = ipc_call_alloc(FRAME_ATOMIC); |
if (!call) { |
return; |
306,12 → 326,12 |
} |
call->flags |= IPC_CALL_NOTIF; |
/* Put a counter to the message */ |
call->priv = ++irq->notif_cfg.counter; |
call->priv = ++rcu_dereference_pointer(irq->notif_cfg).counter; |
/* Set up args */ |
IPC_SET_METHOD(call->data, irq->notif_cfg.method); |
IPC_SET_METHOD(call->data, rcu_dereference_pointer(irq->notif_cfg).method); |
|
/* Execute code to handle irq */ |
code_execute(call, irq->notif_cfg.code); |
code_execute(call, rcu_dereference_pointer(irq->notif_cfg).code); |
|
send_call(irq, call); |
} |
328,6 → 348,7 |
void ipc_irq_cleanup(answerbox_t *box) |
{ |
ipl_t ipl; |
ipc_notif_cfg_t *new_notify, *old_notify; |
|
loop: |
ipl = interrupts_disable(); |
338,7 → 359,7 |
irq_t *irq; |
DEADLOCK_PROBE_INIT(p_irqlock); |
|
irq = list_get_instance(cur, irq_t, notif_cfg.link); |
irq = list_get_instance(cur, irq_t, notif_cfg->link); |
if (!spinlock_trylock(&irq->lock)) { |
/* |
* Avoid deadlock by trying again. |
349,21 → 370,22 |
goto loop; |
} |
|
ASSERT(irq->notif_cfg.answerbox == box); |
ASSERT(irq->notif_cfg->answerbox == box); |
|
list_remove(&irq->notif_cfg.link); |
list_remove_rcu(&irq->notif_cfg->link); |
|
/* |
* Don't forget to free any top-half pseudocode. |
*/ |
code_free(irq->notif_cfg.code); |
new_notify = malloc(sizeof(ipc_notif_cfg_t),0); |
new_notify->notify = false; |
new_notify->answerbox = NULL; |
new_notify->method = 0; |
new_notify->code = NULL; |
new_notify->counter = 0; |
copy_link_rcu(&irq->notif_cfg->link, &new_notify->link); |
old_notify = irq->notif_cfg; |
rcu_assign_pointer(irq->notif_cfg, new_notify); |
rcu_sync_callback_normal_alloc(&ipc_notif_free_callback, old_notify); |
|
|
irq->notif_cfg.notify = false; |
irq->notif_cfg.answerbox = NULL; |
irq->notif_cfg.code = NULL; |
irq->notif_cfg.method = 0; |
irq->notif_cfg.counter = 0; |
|
spinlock_unlock(&irq->lock); |
} |
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